The Ornithosauria: An elementary study of the bones of Pterodactyles made from fossil remains found in the Cambridge Upper Greensand, and arranged in the Woodwardian Museum of the University of Cambridge

"The Ornithosauria" by H. G. Seeley is a scientific publication written in the late 19th century. This work serves as an elementary study focused on the bones of pterodactyles, particularly derived from fossil remains found in the Cambridge Upper Greensand. The book discusses the anatomy and classification of these fascinating prehistoric flying reptiles, exploring the differences and similarities between them and modern birds. The opening of this study outlines the purpose and structure of the memoir, which is part of a larger catalogue for the Woodwardian Museum at Cambridge. Seeley introduces the extensive collection of pterodactyle fossils that provide insight into the skeletal structure of the Ornithosauria group. He notes the multitude of bones available for study, indicating the variety of species represented, and emphasizes the importance of these fossils for understanding not only their anatomy but also their evolutionary relationships to birds and reptiles. The introduction sets the stage for a detailed exploration of the osteology of pterodactyles, highlighting the methods of classification and the historical context surrounding these ancient creatures.